<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>计算器</title>
</head>
<body>
<div>
  <input type="text" v-model="n1">
  <input type="text" v-model="n2">
  <input type="button" value="加" @click="f('+')">
  <input type="button" value="减" @click="f('-')">
  <input type="button" value="乘" @click="f('*')">
  <input type="button" value="除" @click="f('/')">
  <h1>结果：{{result}}</h1>
</div>
<script src="../../js/vue.min.js"></script>
<script>
  let v = new Vue({
      el:"body>div",
      data:{
        result:"0",n1:"",n2:""
      },
      methods:{
        f(x){
            v.result = eval(v.n1+x+v.n2);

        }
      }
  })
</script>
</body>
</html>